Edwin t



(No Model.)

E. T.,GREBNFIBLD.

METHOD 0F MAKING BINDING POSTS. No. 454,430. Patented June 16, 1891.

@Mmmm mmfm )IOMPQILOMQ y T/bmw' UNITED STATES PATENT OEEIcE.

EDV/TIN T. GREENFIELD, OF NEV YORK, N. Y., ASSIGNOR TO TIIE INTERIOR CONDUIT AND INSULATION COMPANY, OF SAME PLACE.

METHOD OF MAKING BINDING-POSTS.

SPECIFICATION forming part of Letters Patent No. 454,430, dated J une 16, 1891.

Application tiled December 1'6, 1890. Serial No. 374.857. (No model.)

To @ZZ whom it may concern: In forming the blocks 4c holes are provided Be it known that I, EDWIN T. GREENEIELD, for the reception ot' the binding-posts er tera citizen of the United States, residing at minals, andin the bottoni of the block grooves New York city, county and State of New ll are formed. Said holes or i'ecesses coii- 55 5 York, have invented a cert-ain new and useforni in shape and iii position to the termi' ful Improvement in Methods of Making Con* nals to be supported by the block.

necting and Supporting Blocks and Terniil2 is a mold of metal or other suitable manals Therefor, of which the following is a terial, the face of which is formed to correspeciiication. spond in shape with the face of the block 6o 10 The invention relates to the method of above described, there being a groove 13 for forming terminals or binding-posts and seeach of the iiisulating-iiaiiges 5 and correcuring them in position in the insulatingspending depressions for other raised porblocks in which they are to be used. tions on the face of the block.

The object of the invention is to increase Depressioiis 14 are provided in the mold 65 I5 the facility of manufacture of said devices, for the reception of the heads of screws for to lessen the cost ot' the devices, and at the the binding-posts. same time to furnish a simpler construction The method of forming the posts will now than has heretofore been used. be described. Screws are first placed on the In the accompanying drawings, which illusmold in the position indicated in Figs. 2 and 7o 2o trate my improvements, Figure l is a plan 3. The block at is then inverted over the view of a portion of a block with the bindscrews and rests on the face of the mold, as ing-posts in place therein. Fig. 2 is a section indicated in Figs. 2 and 3. If it is desired to on line 2 2 of Fig. l, the block being inverted permanently connect electrical wires with the and placed face downward on a mold. Fig. 3 binding-posts for any purpose, such wires are 75 25 is a similar section on line 3 3 of Fig. 1. inserted into the holes in the block, as shown The block or plate 4, already referred to, at lO. Molten lead or other suitable nieta-l may be made of any suitable insulating` iiiais poured into said holes around the screws terial, preferably of some material which can and around the wires, thus forming the posts. be cast or molded into the proper formfor After the metal has set or partially set the So 3o example, earthenware. The block illustrated block et is raised and the screws 9 are turned is provided with several ribs or iianges 5 out. This may be done when the post is to across its face for the purpose of separating be used, the screws being turned out at least the circuit-=terminals by an insulated screen, far enough to admit a wire under the heads. as is well known in the art. The binding- By this method the wires and binding-posts 85 3 5 posts 6 7, carried by the block, which may be are firmly connected, the posts aie securelyof any desired shape and of which there may attached and held in the block, and the screwbe any desired number, are placed between threaded socket for the binding-screw is made. the several flanges, as shown. Post G is The posts are permanently embedded or shown provided with a single screw and post formed in a block in the apertures, as distin- 9o 4o 7 with two screws. 7 also has two metallic guished from constructionsin which posts are extensions 7. lVhen an external wire is to made and then temporarily or removably be connected to this binding-post, it is placed placed in a supporting-plate. It will be eviunder the head of the lower screw between dent that the several posts or terminals may one of the extensions 7 and the shank of the be connected in the grooves 11 in any desired 95 4, 5 screw and the screw then tightened, as will order. Said grooves may then be filled with be evident. insulating material.

9 are the binding-screws co-operatiiig with Heretofore in making connecting devices the posts in the ordinary manner. of this character tlie block has been formed,

In Fig. 2, 10 is the end of a wire nietallicmetal posts havebeen made, screw-holeshave Ioc 5c ally connect-ed with a binding-post in the been drilled therein, and the posts have been mannerhereinafterdescribed. inserted into the holes provided for them and nsecured by nuts. Connectingwires have then been soldered to the posts. The several parts constituting the device and the labor required in putting the parts together were more expensive than in my'new device and method, as will appear from the description before given. In some cases I may cast the posts directly in the holes in the block in which they are to remain as permanent fixtures Without placing the screws on the mold. The screw-hole may then be made in any suitable manner. After forming the posts, as describd, I prefer to copper-plate the exposed ends. v

Although the binding-posts are made of a metal which is a comparatively poor conductor, I have found that in practice, When y made as above described, they have a carrying capacity sufficient for the current which is used in the system for which they are designed.

Having thus described theinvention, what I claim isl1.Y The method of making connecting and supporting blocks for electrical purposes, consisting in forming a block of insulating material withY recesses conforming in shape and position to the terminals to be supported by said block, and then filling said recesses with melted metal and allowing the same to harden and to remain therein, substantially as described.

2. The method of making connecting and supporting blocks for electrical purposes, consisting in forming a block of insulatingl material with recesses conforming in shape and in said recesses, and'lilling the recesses around Y the screws and Wires with melted metal and allowing the same to harden and to remain in the recesses, substantially as described.

4. The method of making connecting and supporting blocks for electrical purposes, consisting in forming a block of insulating material with recesses conforming in shape and position to the terminals to be supported by said block, forming a mold adapted to receive the face of said block and with depressions, placing ascreW with its. head in each'depression, inverting the block over said mold and screws, and filling the recesses around the screws with melted metal and' retaining the same in the block, substantially as described. This specification signed and witnessed this 13th day of December, 1890.

EDWIN T. GREENFIELD.

Witnesses:

D. H. DRIscoLL, CHARLES M. OATLIN. 

